<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- 导入依赖 -->
    <script src="https://lib.baomitu.com/leaflet/1.9.2/leaflet.js"></script>
    <link rel="stylesheet" href="https://lib.baomitu.com/leaflet/1.9.2/leaflet.css">
    <style>
        * {
            margin: 0;
            padding: 0
        }

        #map {
            width: 100vw;
            height: 100vh;
        }
    </style>
</head>

<body>
    <div id="map">

    </div>
    <script>
        /* 瓦片图层 */
        var url = 'https://api.mapbox.com/styles/v1/mapbox/streets-v11/tiles/{z}/{x}/{y}?access_token=pk.eyJ1IjoiY2hlbmdiZW5jaGFvIiwiYSI6ImNsODU3aGRiODA0Y2UzcHBzZmFlcmdqZ2sifQ.8k59W_pB_Riwe6o-MneRlA'
        var layer = L.tileLayer(url, {
            maxZoom: 19,
            attribution: '© OpenStreetMap'
        })
        /* 实例化地图 */
        const map = L.map("map", {
            layers: [layer],
            /* center:[纬度,经度] */
            center: [30.50, 114.30],
            zoom: 4
        })
        /* 1、标准 */
        // var data = {
        //     type: "FeatureCollection",
        //     features: [
        //         {
        //             type: "Feature",
        //             geometry: {
        //                 type: "LineString",
        //                 coordinates: [ // 线坐标：二维数组
        //                     [114, 30], [118, 30]
        //                 ]
        //             }
        //         }
        //     ]
        // }
        /* 2、非标准 */ // 直接只写一个feature对象 // 也可以加载出来
        var no_data = {
            type: "Feature",
            geometry: {
                type: "LineString",
                coordinates: [
                    [114, 30], [118, 30]
                ]
            }
        }
        var line_layer = new L.geoJSON(no_data);
        map.addLayer(line_layer);
    </script>
</body>

</html>